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The compounds [Cr(NH3)5(SO4)]Br and [Cr(NH3)5Br]SO4 are examples of coordination isomers. Carefully examine the structures shown below. In this pair of examples, the counter-ions are included in the display. The positions of the counter-ions are fixed relative to the complexes in these displays, but in solution the complex ion and counter-ion move independently of each other.
|pentaamminesulfatochromium(III) bromide||pentaamminebromochromium(III) sulfate|
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